Pulse sensor, oximeter, optical, GY MAX30100, I2C

Optical pulse monitoring sensor module using the MAX30100 integrated circuit.

The module incorporates LEDs, optical elements, photodetector and low-noise electronics with the advantage of rejecting ambient light. It is ideal for developing wearable applications.

It communicates via I2C and is powered between 3 and 5VDC and can be turned off via software with zero standby current consumption, suitable for portable devices.

Specifications:

Supply voltage: 3 - 5VDC

Applications: Pulse oximeter (SpO2), Heart rate monitor

Pins: VIN, GND, SCL, SDA, INT

Optical sensor cover glass: Yes

Programmable refresh rate and LED current: Yes, for power consumption optimization

Pulse monitoring consumption: <1mW

Current consumption in off mode: 0.7µA Typ.

Fast data output: Yes

Resistance to motion data interfaces: Yes

Operating temperature: -40 C - +85 C

Dimensions mm: 12.7 x 12.7mm

Pinout:

Use:

Install the library available in the Download section.

The module has the typical I2C address 0x57.

Upload the following test code to the Arduino board:

Test Code:

#include

#include "MAX30100_PulseOximeter.h"

#define REPORTING_PERIOD_MS 1000

PulseOximeter pox;

uint32_t tsLastReport = 0;

void onBeatDetected()

{

Serial.println("Drunk!");

}

void setup()

{

Serial.begin(115200);

Serial.print("Initializing pulse oximeter..");

// Initialize the PulseOximeter instance

// Failures are generally due to an improper I2C wiring, missing power supply

// or wrong target chip

if (!pox.begin()) {

Serial.println("FAILED");

for(;;);

} else {

Serial.println("SUCCESS");

}

pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);

// Register a callback for the beat detection

pox.setOnBeatDetectedCallback (onBeatDetected);

}

void loop()

{

// Make sure to call update as fast as possible

pox.update();

if (millis() - tsLastReport > REPORTING_PERIOD_MS) {

Serial.print("Heart rate:");

Serial.print(pox.getHeartRate());

Serial.print("bpm / SpO2:");

Serial.print(pox.getSpO2());

Serial.println("%");

tsLastReport = millis();

}

}